Auxiliary air valve for engines



Jan. 30, 1923.

F. W. 'ANDREWS. AUXILIARY AIR VALVE FOR ENGINES;

FILED JAN. 3, .1919.

FEA'FT... 53'. iNDP-JEWS, OI GHEU.

AUXILIAEY AER VALVE EDE-ENGIEES.

To (:ZZ wi am may concave:

Be it known that l, Emmi W. ANDREWS, a citizen of the United States, residing at iVapeiicneta, in the county of Auglaize and 5 State of {Elli-a, have invented certain new and usefni Improvements in Auxiliary Air Valves for-Engines. cf which the following is a speciiicziticn. My inveniion i'elatcs to ezplosi ve enand more nairiiculsi'ly t o :1 compensating valve afiorciing alga-maxillary SHIEPly of six $0 the intake manifold of the engine inilepcmleni cf the carburetor, in automatica regulated c'pcition's, thereby 3,23 3.5 ing ihe "lClERLSS the explosive mixture in and miner inciwill more fully '01:, i-he i veniion oi C(fif...'i!1i the thereof and the cu see forth in the 'ring 0 the h awings, Fig". l is a per "if k3 manifclil for an in which iifi ilflfilllal ziiz' ms i) 3. applied. e foiining the explosive engines should Likewise" it is found hydro-carbon iuel.

zzi'e net only cheapenecl in con;

- the equivalents, as

ing the subject limiter. ii

sivisablecc vary. the richness of the explosive mixture with variations of atmospheric temperature. When the engine is cold from leng idleness, or on M cciciclay ilie engine starts sluggishly and requires an expiosi e mixture much richer in'liyclro-cerbon fuel thenon a. Warm day or after the engine lies been beamed up by longcpemfiicn. l

Various attempts have been made 0 provide compensating cent-r01 feazures in the carburetor in automatically regulate the pi'epoztion 01. ei and fueliii the mixture. Such consiructicns have 110% seen found. sat- 2'6 isi'acfiory. and it is foun l the teiidency when operating 11?. high speed is to draw intofihe cylinders a mixture ice zicii'iii The presen invention is designed tc 21501 5. supplements-l supply of air independentv 0f the carburetor which will be efie-ctive only ail/er the engine has been glaced in full cperaticnend will thereafter cciiectly and eutpme iiciilly pram poriion ihe supply of air in ihe sez'usl needs 86 of the engine. While spring operated val es opemted'by the. suction of the engins, have been heretofore known in this. are. in the present invention the lilijl'OCillC- tion intc such sti'uciicns of e 'ilieri'nal factor wiereby the fin to she suction eilec or the u'ciion oi? v we air pressure supe induced by the vacuum Within the ineniiclil is fnril1er moi 'fied by the variation of ienipeistu e. This is -z! most 94) important feeiuz'e regulation. as itance of the fuel supply at a more uniform temperature, amid.- ing extreme fluctuations in the character and quality the fuel, and euteznzii-icaliy 95 reduces the proportion cf fuel in the highly heated charges at which time the lesser quimtihy of more hly volatiiizecl ifuel. 21f, lords ei' ual eliiciency, thereby conserving the fuel.

The sueomatic cmnpcnsaiing (lei-ice fern.

" of is ccnm ed in ennry manifold 1 eei'm eiiiizitc the cmlmz'eiici' ports intc the cylinder.

prises a main body portion having a polyg cnal head 2 with a screw threaded extension 3 for engagement in the menifeld wall. At the opposite side cf illlfi head 2 the boil the intake and the pniftion is screw threaded for the recep- 1w tien cf a tapered nozz'e of fiusic-ccnicai 02m. aii ustebly nwunted ii gicn the body The waive 8011b portion. The body portion is provided with a longitudinal bore 6, countcrbored at 7 to form. 2. spring seat and chamber. Seated Within the tapered interior of the conical jected to increased temperature, and becomin more resistant or more still when cold.

While any suitable material or alloy having heat sensitive properties, whereby a variation of temperature correspondingly varies the resistance of the spring, may be employed, a material found uite suitable is a spring wire having a very n gl1percentage of copper, alloyed with a limited amount of bell metal.

At low temperatures the tl'ierniostetic spring 10 affords its greatest resistance to the openin movement of the bell valve 9. This initial resistance can be readily varied to agree with the conditions of use, the type or make of engine and the desire of the driver by the adjustment of the tapered nozzle 5. By the screw threaded adjustmerit of the nozzle the sprirw is placed under more or less tension. having been initially set to the desired tension the valve will open more or less to regulate the admission of air under the influence of the suction eil'ected by "the engine operation, or rather the preponderance of air pressure over that Within the manifold. However the degree to which the valve opens and the charge of air admitted. is not always proportionate to the degree of vacuum produced, as in other valves of this character. Sometimes a low vacuum will induce a large charge of air and a high vacuum a small I charge of air and vice versa. W hile the suction affords the valve actuating means the efiect of the operation is to a. considerable extent regulated by the variation of resistence of the spring 10. This spring being of thermostatic character varies its resistance with variations of engine and external temperature. At low temperature as on a cold day or after the engine has stoodidle,

the thermostatic spring 10 will be more resistant regardless of the degree of vacuum, while on e-vvarm do or after the engine is in full operation an heated up. the thermostetic spring ,Wlll grow less resistant and Will so yield more readily, and admit an increased charge or air, even under low vacuum conditions.

While the valve is .operategl by suction mower and at a given temperature the opening of the valve will vary in eccordsnce with the suction or extent of the vacuum within the manifold, the operation of the valve will also be varied at a given constant suction or vacuum effort in accordance with tempers-- ture variations, thus one method of control overlaps or interlocks with the otherin such Way as to ellect an ideal balanced regulation dependent upon both suction and tempera ture.

From the above description it will be ap parent that there is tlius provided s device of the character described,-pomessing the particular features of. advantage before enumerated as desirable, but which obviously is susceptible of modification in its form, proportion, detail construction, and arrangement of parts, Without departing from the principle involved, or sebeificing any of its advantages.

ll liilc to comply with the statute, the invention has been described in language more or less specific as to certain structural features, it is to be understood that the invention is not limited to the specific details shown, but that the means and construe tion herein disclosed comprise but one mode of putting the invention into eil'ect, and the invention is therefor claimed in any of its forms or modifications Within the legitimate and valid scope of the appended claims.

Having thus described my invention Ti: claim:

1. A compensating valve for internal combustion engines, conugrising a body portion adapted to be attached to the manifold of an engine, and counterbored to form therein an annular shoulder, an adjustable nozzle interiorily threaded for engagement with said body portion, the outer end of the nozzle having an apertured tapered extension, a ball valve Within the counter bore of the body portion and adapted to seat Within such apertured tapered extension of the nozzle, and a helical conical thermo sensitive spring; abutting at one end upon the ball valve and at the opposite end upon the annular'shoulder of said body portion, the resistance of saidspring to the movement of the valve under influence of atmospheric pressure and varying degrees of vacuum Within the intake, decreasing with an increase of temperature, substantially as specified.

2. In a valve of the character described,- an exteriorly threaded tubular stem, a cap screw threaded upon said stem having: 2.. interior conical seat provided with u vent opening at the apex of the conical seat, a ball engaging said seat to close the vent orifice and a thermally sensitive spring abutting upon said stem portion and said ball tsnding to hold the ball upon the scat said thermally sensitive spring being so constituted and; ajirangedv as to yield mere readily to permit the openin of the valve as its temperature r 3. In'a valve of the character described, a. tubular stem portion ada ted for engagement with the intake mani 01d of a hydrocarbon engine, a cap adjustably mounted on said stem having an air inlet orifice therein, a valve member normally closing said ori- 10 fice, a thermally sensitive spring tending to maintain the valve member in closed position, the tension of said spring bemg vanable by the adjustment of said cap upon said stem and further variable independent of such adjustment inversely as the variations of. temperature under the influence thereof.

' In testimony whereof I have hereunto setmy hand this 26th day of December A. D.

FRANK W. ANDREWS. Witnesses:

' O'rr0 J. BOESEL, VERA L. FISHER. 

